| AVS 66th International Symposium & Exhibition | |
| Biomaterial Interfaces Division | Monday Sessions |
| Session BI+AS+NS-MoM |
| Session: | Biofabrication, Bioanalytics, Biosensors, Diagnostics, Biolubrication and Wear |
| Presenter: | Arturo Talledo, Facultad De Ciencias Universidad Nacional De Ingeniería, Perú |
| Authors: | J.D. Asencios, Facultad De Ciencias Universidad Nacional De Ingeniería, Perú F. Talledo, Facultad De Ciencias Universidad Nacional De Ingeniería, Perú R.A. Moro, Facultad De Ciencias Universidad Nacional De Ingeniería, Perú C.A. Luyo, Facultad De Ciencias Universidad Nacional De Ingeniería, Perú |
| Correspondent: | Click to Email |
Abstract: We built three types of plasmonic structures based on titanium nitride thin films by using the technique dc magnetron sputtering and D-shaped prisms as substrates. The prisms were made of glass or sapphire. Devices with structure Prism/TiN, Prism/TiN/SiO2 and Prism/TiN/SiO2/Nb2O5 were called devices type 1, type 2 and type 3, respectively. Attenuated Total Reflection in the Kretschmann configuration was studied in the three types of devices. Experimental angular spectra were fitted by using a calculation program based on the solutions to Maxwell equations. ATR spectra of devices type 1 show a wide absorption band. The main feature for ATR spectra of devices type 2 was a series of maxima and minima of reflectance within a wide absorption band. ATR spectra of devices type 3 are identified with a very sharp window within the absorption band. The spectra of devices type 2 and type 3 were associated with the phenomena of Multiple Plasmon Induced Transparency (MPIT) and Fano Resonance, respectively. Based on calculations of the square of the electric fields in the involved media, we proposed some simple phenomenological explanations for the phenomena of MPIT and Fano resonance. Potential use of these structures as refractive-index sensors was also discussed.